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Fetal Period Begins

 

9 weeks
Buy NowFrom The Biology of Prenatal Development.

Script: The fetal period continues until birth.

All ages referenced to fertilization, not last menstrual period.
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Fetal Period Begins
Fetal Period Begins
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Motion and Sensation
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Live Long and Prosper
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4D Ultrasound
The Fetal Period
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2 Comments

Maggie Fanelli
November 25, 2010 at 10:50 pm
Maggie Fanelli
So by \"9 weeks\" do they mean 9 menstrual weeks or 9 weeks since conception (11-12 menstrual weeks)?
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EHD
December 29, 2010 at 5:04 pm
EHD
All embryonic and fetal ages are referenced to the time of fertilization (or conception) The age of this 9-week fetus corresponds to 11 weeks from the start of the last menstrual, period.
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